Kermarion kermadecensis (E.A. Smith, 1873)
Helicarion kiiensis M. Azuma, 1960
Helicarion kimioi M. Azuma, 1960
Geotrochus kinabaluensis (E.A. Smith, 1895)
Geotrochus kitteli J.J. Vermeulen, T.S. Liew& M. Schilthuizen, 2015
Rahula kleini E. Gittenberger, Leda& Sherub, 2017
Lepidotrichia kobelti (O.F. von Möllendorff,1890)
Bekkochlamys koshikijimana (H.A. Pilsbry & Y. Hirase,1904)
Ovachlamys kotosyonis (J.T. Kuroda & T. Kano,1941)
Helicarion koyamai J.T. Kuroda, 1953
Helicarion koyanoi T. Habe, 1953
Helicarion kreffti J.C. Cox, 1864
Helicarion kurodai T. Habe, 1957
Helicarion kuroshimana Y. Hirase, 1908
Petalochlamys labilis (A.A. Gould, 1859)
Dendrotrochus labillardierei (E.A. Smith, 1884)
Geotrochus labuanensis L. Pfeiffer, 1863
Helicarion lampra (H.A. Pilsbry & Y. Hirase,1904)
Saphtia lamtoensis A.J. de Winter, 2008
Sivella latior (A.R.J.B. Bavay& P. Dautzenberg, 1908)
Dendrotrochus layardi (W.D. Hartman, 1889)
Helicarion leopardina T. Iredale, 1941
Helicarion leucospira L. Pfeiffer, 1857
Dupontia levensonia J. Gerlach, 2003
Dupontia levis H.H. Godwin-Austen, 1908
Nipponochlamys lineatus (H.A. Pilsbry & Y. Hirase,1904)
Harmogenanina linophora (P.M.A. Morelet, 1860)
Trochochlamys lioconus (H.A. Pilsbry & Y. Hirase,1905)
Helicarion lioderma H.A. Pilsbry, 1901
Westracystis lissus (E.A. Smith, 1894)
Helicarion longa H.A. Pilsbry & Y. Hirase,1905
Helicarion longissima H.A. Pilsbry & Y. Hirase,1909
Hemitrichiella luteofasciata (H.C. Lea, 1840)
Hemitrichiella luteofasciata libmanana (P. Bartsch, 1942)
Helicarion maculosa Hyman,Lamborena & Köhler, 2017